Abstract
Measurement of the quality of water before usage is important; however, this is challenging in developing countries, where water testing equipment is expensive and inaccessible. A Water Quality Monitoring System (WQMS) was developed to ease these unsafe water usage practices and improved water quality monitoring and data management. WQMS consisted of 5 different water quality sensors built on Arduino microprocessors to measure multiple water quality parameters, pH, EC, TDS, temperature and turbidity values simultaneously. Water samples from 5 sampling points S1, S2, S3, S4, and S5 along River Ogun, Nigeria were tested and their Water Quality Status (WQS) was calculated using the Weighted Arithmetic Water Quality Index. WQMS has 78% efficiency and able to measure multiple WQIs. All studied parameters were significantly different, probably attributed to WQMS calibration methods and sensor performances. The WQS of the sampled water ranged from 26 to 50, which, according to standards, was within good water quality.